In order to allow zswap users to choose between zbud and zsmalloc for the compressed storage pool, this patch set adds a new api "zpool" that provides an interface to both zbud and zsmalloc. Only a minor change to zbud's interface was needed, as detailed in the first patch; zsmalloc required shrinking to be added and a minor interface change, as detailed in the second patch. I believe Seth originally was using zsmalloc for swap, but there were concerns about how significant the impact of shrinking zsmalloc would be when zswap had to start reclaiming pages. That still may be an issue, but this at least allows users to choose themselves whether they want a lower-density or higher-density compressed storage medium. At least for situations where zswap reclaim is never or rarely reached, it probably makes sense to use the higher density of zsmalloc. Note this patch series does not change zram to use zpool, although that change should be possible as well. Dan Streetman (4): mm: zpool: zbud_alloc() minor param change mm: zpool: implement zsmalloc shrinking mm: zpool: implement common zpool api to zbud/zsmalloc mm: zpool: update zswap to use zpool drivers/block/zram/zram_drv.c | 2 +- include/linux/zbud.h | 3 +- include/linux/zpool.h | 166 ++++++++++++++++++ include/linux/zsmalloc.h | 7 +- mm/Kconfig | 43 +++-- mm/Makefile | 1 + mm/zbud.c | 28 ++-- mm/zpool.c | 380 ++++++++++++++++++++++++++++++++++++++++++ mm/zsmalloc.c | 168 +++++++++++++++++-- mm/zswap.c | 70 ++++---- 10 files changed, 787 insertions(+), 81 deletions(-) create mode 100644 include/linux/zpool.h create mode 100644 mm/zpool.c -- 1.8.3.1 -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>